A $700 build without VGA,monitor,input devices

[szon0111]

Hello!This is my first build and im a student so im not good at hardwares but im gonna try. As i mentioned earlier it's gonna be an AMD $700 pc.
I need a AMD cpu,mobo,ram,power,hdd. I;m thinking of getting a case from another country which i liked a lot.
This is what i got...from newegg.

AMD Athlon 64 3700+ San Diego 1GHz FSB Socket 939 Processor Model ADA3700BNBOX - Retail
http://www.newegg.com/Product/Produc...82E16819103539

ABIT KN8 Ultra Socket 939 NVIDIA nForce4 Ultra ATX AMD Motherboard - Retail
http://www.newegg.com/Product/Produc...82E16813127222

Seagate Barracuda 7200.9 SATA NCQ 3Gb/s ST3160812AS 160GB 7200 RPM SATA 3.0Gb/s Hard Drive - OEM
http://www.newegg.com/Product/Produc...82E16822148105

Patriot Signature 2GB (2 x 1GB) 184-Pin DDR SDRAM DDR 400 (PC 3200) Unbuffered System Memory Model PSD2G400KH - Retail
http://www.newegg.com/Product/Produc...82E16820220079

total about $600 with these four
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I feel pretty good with the cpu and hdd, but im not sure with the mobo and ram.
I was comparing this mobo with some others like ASUS A8N-E Socket 939
http://www.newegg.com/Product/Produc...82E16813131530
but the one i chose had the best feedback so i chose it but im not sure if it;s a good choice. I dont want to spend 200 for a mobo. $100 would be fine.

For the ram, im not a overclocker so i just need cheap ram that is from reliable companies. Im thinking of corsair value, geil, patriots,etc. Im planning to spend about $170 for 2gb.

I really need help with my power supply because i have no knowledge. Stability is the most important aspect and im thinking about $50~70 for it.

-----thanks a lot. Im hoping for some great advice.


p.s. should i get a better mobo and have 1gb of ram instead of 2gb?i do p2p, some 3d gaming, and surfing internet.